September weather in Basin, WY
The average temperature in Basin in September is 63.4°F (47.5°F–79.3°F). Average precipitation: 0.95 inches. Average snowfall is 0.2 inches.
September is a fall month in Basin, and is warmer than the annual average of 48.9°F. Daily temperatures swing about 31.8°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 12h 17m. For travel, September is a comfortable month to visit.
Avg High
79.3°F
Avg Low
47.5°F
Precipitation
0.95 in
Snow
0.2 in
September records in Basin
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 98.1°F (1950) | 34.0°F (1908) | 0.74 in (2008) |
| September 2 | 99.0°F (1908) | 30.0°F (1908) | 0.40 in (1968) |
| September 3 | 102.0°F (1950) | 30.9°F (2010) | 0.41 in (1949) |
| September 4 | 102.0°F (1950) | 30.0°F (1908) | 0.43 in (1999) |
| September 5 | 100.0°F (1978) | 32.0°F (1965) | 0.52 in (2023) |
| September 6 | 100.0°F (2020) | 33.1°F (1918) | 0.42 in (2001) |
| September 7 | 98.1°F (1908) | 33.1°F (2008) | 0.38 in (1986) |
| September 8 | 100.9°F (2022) | 30.0°F (1962) | 0.66 in (1973) |
| September 9 | 98.1°F (1979) | 30.0°F (1962) | 0.86 in (2022) |
| September 10 | 95.0°F (1905) | 30.9°F (1970) | 0.42 in (1961) |
| September 11 | 96.1°F (1959) | 30.9°F (1989) | 0.80 in (2014) |
| September 12 | 93.0°F (1953) | 30.0°F (1914) | 1.13 in (2019) |
| September 13 | 97.0°F (1990) | 27.0°F (1974) | 0.72 in (1998) |
| September 14 | 98.1°F (1948) | 26.1°F (1974) | 0.34 in (1960) |
| September 15 | 96.1°F (1948) | 28.0°F (1905) | 1.40 in (1994) |
| September 16 | 98.1°F (2000) | 28.0°F (1936) | 1.00 in (1965) |
| September 17 | 95.0°F (2000) | 28.9°F (1965) | 0.47 in (1996) |
| September 18 | 93.9°F (1937) | 21.9°F (1905) | 0.56 in (1967) |
| September 19 | 96.1°F (1937) | 26.1°F (1905) | 1.22 in (1907) |
| September 20 | 93.9°F (1956) | 23.0°F (1983) | 0.63 in (1940) |
| September 21 | 91.9°F (1903) | 23.0°F (1978) | 0.40 in (2006) |
| September 22 | 93.9°F (1905) | 26.1°F (1913) | 1.10 in (1913) |
| September 23 | 93.0°F (1905) | 26.1°F (1913) | 1.39 in (1918) |
| September 24 | 93.0°F (1992) | 19.9°F (1926) | 1.35 in (2016) |
| September 25 | 98.1°F (1921) | 14.0°F (1926) | 0.57 in (1908) |
| September 26 | 95.0°F (2015) | 19.0°F (1926) | 0.18 in (2013) |
| September 27 | 98.1°F (2015) | 21.0°F (1926) | 0.76 in (1923) |
| September 28 | 91.9°F (2001) | 21.9°F (1950) | 0.55 in (1982) |
| September 29 | 91.0°F (1933) | 24.1°F (1939) | 1.16 in (2019) |
| September 30 | 95.0°F (2024) | 19.9°F (1985) | 0.78 in (1918) |